Note 6 - Accounts Payable and Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]

Account	December 31, 2017		December 31, 2016
Accounts payable	$	1,303,073	$	697,060
Accrued payroll and related costs		925,890		886,334
Other accrued expenses		184,131		431,961
Accrued interest		172,951		107,718
Total accounts payable and accrued expenses	$	2,586,045	$	2,123,073